Construction

Tonnage Calculator

Find the tons of bulk material for an area.

Area

Depth

Density (lb/ft³)

Calculated Output

Weight 1.667

Volume 1.235

Formula: tons = area × depth/12 × density ÷ 2000

Step-by-Step Breakdown

1. Values used:

2. Area = 400

3. Depth = 1

4. Density = 100 lb/ft³

6. Weight = 1.667

7. Volume = 1.235

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The math behind it

volume (ft³) = area × depth; tons = volume × density ÷ 2,000.

400 ft² at 4 in, 100 lb/ft³ → ~6.7 tons.

Density?

Gravel/sand ≈ 100, stone ≈ 165 lb/ft³.